/* ==========================================================
   火博体育 · 全站共享样式  /assets/site.css
   设计语言：黑白高对比 + 火焰红锚点 + 科技蓝数据 + 金色荣誉
   构图逻辑：目录型内容地图 · 对角线速度感 · 专题研究板
   ========================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --hb-ink: #111111;
  --hb-paper: #F5F1EA;
  --hb-red: #E02A2A;
  --hb-blue: #1B6DF2;
  --hb-gold: #C9A227;
  --hb-gray-600: #525252;
  --hb-gray-300: #D1D5DB;
  --hb-soft-orange: #FF6B35;
  --hb-deep-blue: #0A2540;
  --hb-light-gray: #E5E7EB;

  --hb-font-sans: system-ui, -apple-system, "Segoe UI", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --hb-font-mono: "SF Mono", "Cascadia Mono", Consolas, "Roboto Mono", "Liberation Mono", monospace;

  --hb-container: 1280px;
  --hb-gutter: clamp(1rem, 4vw, 3rem);

  --hb-space-1: 0.25rem;
  --hb-space-2: 0.5rem;
  --hb-space-3: 1rem;
  --hb-space-4: 1.5rem;
  --hb-space-5: 2rem;
  --hb-space-6: 3rem;
  --hb-space-7: 4rem;

  --hb-radius: 6px;
  --hb-transition: 200ms ease;
}

/* ---------- 2. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--hb-font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--hb-ink);
  background: var(--hb-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: var(--hb-blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--hb-red);
}

ul,
ol {
  list-style: none;
}

address {
  font-style: normal;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 900;
  line-height: 1.3;
  color: var(--hb-ink);
}

::selection {
  background: var(--hb-red);
  color: #ffffff;
}

/* ---------- 3. 排版与正文容器 ---------- */
.hb-prose {
  max-width: 70ch;
  line-height: 1.85;
}

.hb-prose p {
  margin-block: var(--hb-space-3);
}

.hb-prose h2 {
  margin-top: var(--hb-space-6);
  margin-bottom: var(--hb-space-3);
  font-size: 1.5rem;
  border-left: 4px solid var(--hb-red);
  padding-left: var(--hb-space-3);
}

.hb-prose h3 {
  margin-top: var(--hb-space-5);
  margin-bottom: var(--hb-space-2);
  font-size: 1.15rem;
}

.hb-prose a {
  color: var(--hb-blue);
  text-decoration: underline;
}

.hb-prose code {
  font-family: var(--hb-font-mono);
  font-size: 0.85em;
  background: var(--hb-light-gray);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.hb-prose blockquote {
  margin: var(--hb-space-5) 0;
  padding: var(--hb-space-4) var(--hb-space-5);
  background: var(--hb-ink);
  color: var(--hb-paper);
  border-radius: var(--hb-radius);
  border-left: 4px solid var(--hb-red);
}

/* ---------- 4. 通用容器与网格 ---------- */
.hb-container {
  width: 100%;
  max-width: var(--hb-container);
  margin-inline: auto;
  padding-inline: var(--hb-gutter);
}

.hb-grid {
  display: grid;
  gap: var(--hb-space-5);
  grid-template-columns: repeat(12, 1fr);
}

.hb-grid__col--span-4 {
  grid-column: span 4;
}

.hb-grid__col--span-6 {
  grid-column: span 6;
}

.hb-grid__col--span-8 {
  grid-column: span 8;
}

.hb-grid__col--span-12 {
  grid-column: span 12;
}

@media (max-width: 767px) {
  .hb-grid__col--span-4,
  .hb-grid__col--span-6,
  .hb-grid__col--span-8,
  .hb-grid__col--span-12 {
    grid-column: span 12;
  }
}

/* 等宽章节索引标签 */
.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--hb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hb-gray-600);
}

.section-index::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--hb-red);
}

/* ---------- 5. 按钮 ---------- */
.hb-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  background: var(--hb-red);
  color: #ffffff;
  border: 2px solid transparent;
  border-radius: 4px;
  font-family: var(--hb-font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--hb-transition),
              color var(--hb-transition),
              border-color var(--hb-transition),
              transform var(--hb-transition);
}

.hb-button:hover {
  background: #b81f1f;
  color: #ffffff;
  transform: translateY(-2px);
}

.hb-button:focus-visible {
  outline: 3px solid var(--hb-blue);
  outline-offset: 2px;
}

.hb-button--secondary {
  background: transparent;
  border-color: var(--hb-ink);
  color: var(--hb-ink);
}

.hb-button--secondary:hover {
  background: var(--hb-ink);
  color: var(--hb-paper);
}

.hb-button--ghost {
  background: transparent;
  border-color: var(--hb-gray-300);
  color: var(--hb-ink);
}

.hb-button--ghost:hover {
  border-color: var(--hb-ink);
  background: transparent;
  color: var(--hb-red);
}

/* ---------- 6. 徽章 ---------- */
.hb-badge {
  display: inline-block;
  padding: 0.2em 0.8em;
  background: var(--hb-gold);
  color: var(--hb-ink);
  font-family: var(--hb-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  line-height: 1.6;
}

/* ---------- 7. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--hb-light-gray);
  border-radius: var(--hb-radius);
  overflow: hidden;
  border: 1px solid var(--hb-gray-300);
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

.media-frame--portrait {
  aspect-ratio: 3 / 4;
}

.media-frame--tilted {
  transform: rotate(-1.5deg);
  box-shadow: 8px 12px 24px rgba(17, 17, 17, 0.1);
}

.media-frame--tilted:hover {
  transform: rotate(-0.5deg) translateY(-4px);
  transition: transform var(--hb-transition);
}

.media-frame > img,
.media-frame > video,
.media-frame > [data-placeholder] {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame::after {
  content: attr(data-label);
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 0.35rem 0.8rem;
  background: var(--hb-ink);
  color: var(--hb-paper);
  font-family: var(--hb-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  border-radius: 0 var(--hb-radius) 0 0;
  opacity: 0;
  transition: opacity var(--hb-transition);
}

.media-frame:hover::after {
  opacity: 1;
}

/* ---------- 8. 信息面板 ---------- */
.hb-panel {
  position: relative;
  background: var(--hb-deep-blue);
  color: var(--hb-paper);
  padding: var(--hb-space-5);
  border-radius: var(--hb-radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hb-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--hb-space-5);
  width: 3.5rem;
  height: 3px;
  background: var(--hb-red);
}

.hb-panel h2,
.hb-panel h3 {
  color: var(--hb-paper);
}

.hb-panel p {
  color: rgba(245, 241, 234, 0.82);
}

/* ---------- 9. 面包屑 ---------- */
.hb-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--hb-font-mono);
  font-size: 0.78rem;
  color: var(--hb-gray-600);
  padding-block: var(--hb-space-3) 0;
}

.hb-breadcrumb a {
  color: var(--hb-blue);
  text-decoration: none;
}

.hb-breadcrumb a:hover {
  text-decoration: underline;
}

.hb-breadcrumb__sep {
  color: var(--hb-gray-300);
}

/* ---------- 10. Skip Link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--hb-red);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 var(--hb-radius) 0;
  transition: left 0s;
}

.skip-link:focus {
  left: 0;
}

.skip-link:focus-visible {
  outline: 3px solid var(--hb-blue);
  outline-offset: 0;
}

/* ---------- 11. 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(17, 17, 17, 0.12);
  z-index: 1000;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--hb-red) 0%, var(--hb-red) 70%, var(--hb-blue) 100%);
}

/* ---------- 12. Header ---------- */
.site-header {
  position: relative;
  background: var(--hb-ink);
  color: var(--hb-paper);
  border-bottom: 4px solid transparent;
  /* 三色终点线：火红 / 金 / 蓝 */
  background-clip: padding-box;
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--hb-red) 0%, var(--hb-red) 58%, var(--hb-gold) 58%, var(--hb-gold) 66%, var(--hb-blue) 66%, var(--hb-blue) 100%);
  z-index: 2;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 14px,
    rgba(255, 255, 255, 0.025) 14px,
    rgba(255, 255, 255, 0.025) 15px
  );
  pointer-events: none;
  z-index: 0;
}

.site-header__inner {
  position: relative;
  max-width: var(--hb-container);
  margin-inline: auto;
  padding-inline: var(--hb-gutter);
  z-index: 1;
}

.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--hb-space-4);
  padding-block: var(--hb-space-4) var(--hb-space-3);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--hb-space-3);
  text-decoration: none;
  color: var(--hb-paper);
}

.site-header__brand:hover {
  color: var(--hb-paper);
}

.site-header__mark {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  width: 26px;
  height: 34px;
  background: linear-gradient(150deg, var(--hb-red) 15%, var(--hb-soft-orange) 90%);
  border-radius: 13px 13px 15px 15px / 15px 15px 12px 12px;
  transform: rotate(-8deg);
  transition: transform var(--hb-transition);
  box-shadow: 0 4px 12px rgba(224, 42, 42, 0.35);
}

.site-header__mark::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 11px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50% 50% 40% 40%;
}

.site-header__brand:hover .site-header__mark {
  transform: rotate(-15deg) scale(1.05);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.site-header__brand-name {
  font-family: var(--hb-font-sans);
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  color: var(--hb-paper);
  line-height: 1.2;
}

.site-header__tagline {
  font-size: 0.78rem;
  color: rgba(245, 241, 234, 0.6);
  letter-spacing: 0.12em;
  line-height: 1.4;
}

/* ---- Header 移动端 toggle ---- */
.site-header__toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: 1px solid rgba(245, 241, 234, 0.3);
  border-radius: var(--hb-radius);
  color: var(--hb-paper);
  font-size: 0.8rem;
  line-height: 1;
  transition: border-color var(--hb-transition), background-color var(--hb-transition);
}

.site-header__toggle:hover {
  border-color: var(--hb-red);
}

.site-header__toggle:focus-visible {
  outline: 3px solid var(--hb-blue);
  outline-offset: 2px;
}

.site-header__toggle-lines {
  position: relative;
  width: 22px;
  height: 18px;
  display: inline-block;
}

.site-header__toggle-line {
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  background: var(--hb-paper);
  transition: transform var(--hb-transition), background-color var(--hb-transition);
}

.site-header__toggle-line:first-child {
  transform: translateY(-5px);
}

.site-header__toggle-line:last-child {
  transform: translateY(5px);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:first-child {
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:last-child {
  transform: rotate(-45deg);
}

.site-header__toggle[aria-expanded="true"] {
  border-color: var(--hb-red);
}

/* ---- Header 导航层 ---- */
.site-header__nav {
  border-top: 1px solid rgba(245, 241, 234, 0.14);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--hb-space-4);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.8rem 0.1rem;
  color: rgba(245, 241, 234, 0.82);
  font-family: var(--hb-font-sans);
  font-weight: 500;
  font-size: 0.92rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--hb-transition);
}

.site-nav__link::before {
  content: attr(data-index);
  font-family: var(--hb-font-mono);
  font-size: 0.68rem;
  color: var(--hb-gray-600);
  margin-right: 0.3rem;
  letter-spacing: 0.04em;
  transition: color var(--hb-transition);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--hb-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--hb-transition);
}

.site-nav__link:hover {
  color: var(--hb-paper);
}

.site-nav__link:hover::before {
  color: var(--hb-soft-orange);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link:focus-visible {
  outline: 3px solid var(--hb-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

.site-nav__link[aria-current="page"] {
  color: var(--hb-paper);
}

.site-nav__link[aria-current="page"]::before {
  color: var(--hb-red);
}

.site-header__mono {
  font-family: var(--hb-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(245, 241, 234, 0.38);
  white-space: nowrap;
}

/* ---- Header 响应式 ----
   平板 ≤ 1024px：缩小导航间距
   手机 ≤ 767px：隐藏导航，唤起汉堡按钮
*/
@media (max-width: 1024px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    padding-block: var(--hb-space-2);
  }

  .site-nav__list {
    flex-wrap: wrap;
    gap: var(--hb-space-2) var(--hb-space-4);
  }

  .site-header__mono {
    display: none;
  }
}

@media (max-width: 767px) {
  .site-header__top {
    padding-block: var(--hb-space-3);
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    display: none;
  }

  .site-header__nav[data-open] {
    display: block;
    border-top: 1px solid rgba(245, 241, 234, 0.14);
    padding-bottom: var(--hb-space-4);
  }

  .site-header__nav[data-open] .site-nav {
    padding-top: var(--hb-space-2);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item {
    border-bottom: 1px solid rgba(245, 241, 234, 0.06);
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    display: block;
    padding: 0.9rem 0.25rem;
    font-size: 1rem;
    border-bottom: none;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--hb-red);
  }

  .site-header__toggle-text {
    display: none;
  }
}

/* ---------- 13. Footer ---------- */
.site-footer {
  position: relative;
  background: var(--hb-ink);
  color: var(--hb-paper);
  border-top: 4px solid transparent;
  background-clip: padding-box;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--hb-red) 0%, var(--hb-red) 58%, var(--hb-gold) 58%, var(--hb-gold) 66%, var(--hb-blue) 66%, var(--hb-blue) 100%);
  z-index: 2;
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 18px,
    rgba(255, 255, 255, 0.02) 18px,
    rgba(255, 255, 255, 0.02) 19px
  );
  pointer-events: none;
  z-index: 0;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--hb-container);
  margin-inline: auto;
  padding: var(--hb-space-6) var(--hb-gutter) var(--hb-space-5);
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: var(--hb-space-5);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--hb-space-2);
}

.site-footer__logo {
  display: flex;
  align-items: center;
  gap: var(--hb-space-3);
}

.site-footer__logo-mark {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  width: 20px;
  height: 26px;
  background: linear-gradient(150deg, var(--hb-red) 15%, var(--hb-soft-orange) 90%);
  border-radius: 10px 10px 12px 12px / 12px 12px 10px 10px;
  transform: rotate(-8deg);
  box-shadow: 0 3px 8px rgba(224, 42, 42, 0.3);
}

.site-footer__logo-mark::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 8px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50% 50% 40% 40%;
}

.site-footer__logo-name {
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: var(--hb-paper);
}

.site-footer__tagline {
  font-size: 0.8rem;
  color: rgba(245, 241, 234, 0.5);
  letter-spacing: 0.12em;
}

.site-footer__note {
  font-size: 0.8rem;
  line-height: 1.75;
  color: rgba(245, 241, 234, 0.6);
  max-width: 30em;
}

.site-footer__column {
  display: flex;
  flex-direction: column;
  gap: var(--hb-space-3);
}

.site-footer__heading {
  font-family: var(--hb-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(245, 241, 234, 0.45);
  margin-bottom: var(--hb-space-2);
  border-bottom: 1px solid rgba(245, 241, 234, 0.1);
  padding-bottom: var(--hb-space-2);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--hb-space-2);
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(245, 241, 234, 0.75);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.5;
  transition: color var(--hb-transition), padding-left var(--hb-transition);
}

.site-footer__link::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--hb-blue);
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: background-color var(--hb-transition), transform var(--hb-transition);
}

.site-footer__link:hover {
  color: var(--hb-paper);
  padding-left: 0.25rem;
}

.site-footer__link:hover::before {
  background: var(--hb-red);
  transform: rotate(135deg);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--hb-space-2);
}

.site-footer__contact-line {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: rgba(245, 241, 234, 0.75);
  line-height: 1.5;
}

.site-footer__contact-line::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--hb-blue);
  transform: rotate(45deg);
  flex-shrink: 0;
  margin-top: 0.5rem;
}

.site-footer__legal {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(245, 241, 234, 0.08);
  padding: var(--hb-space-3) var(--hb-gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--hb-space-2);
  max-width: var(--hb-container);
  margin-inline: auto;
}

.site-footer__copyright {
  font-size: 0.78rem;
  color: rgba(245, 241, 234, 0.55);
}

.site-footer__icp {
  font-family: var(--hb-font-mono);
  font-size: 0.78rem;
  color: var(--hb-gold);
  letter-spacing: 0.06em;
}

/* ---- Footer 响应式 ---- */
@media (max-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--hb-space-4);
    padding-top: var(--hb-space-5);
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__legal {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--hb-space-1);
  }
}

/* ---------- 14. 焦点可见性 & 减少动效 ---------- */
:focus-visible {
  outline: 3px solid var(--hb-blue);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .site-header__mark,
  .site-header__brand:hover .site-header__mark,
  .site-footer__link:hover,
  .site-footer__link:hover::before,
  .hb-button:hover,
  .media-frame--tilted:hover {
    transform: none;
    transition: none;
  }
}

/* ---------- 15. 链接信息样式 ---------- */
.hb-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--hb-blue);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--hb-transition), color var(--hb-transition);
}

.hb-link:hover {
  color: var(--hb-red);
  border-bottom-color: var(--hb-red);
}

.hb-link::after {
  content: "→";
  font-family: var(--hb-font-mono);
  font-size: 0.85em;
  transition: transform var(--hb-transition);
}

.hb-link:hover::after {
  transform: translateX(3px);
}

/* ---------- 16. 深色分隔区块 ---------- */
.hb-section-dark {
  background: var(--hb-ink);
  color: var(--hb-paper);
  padding-block: var(--hb-space-6);
  position: relative;
}

.hb-section-dark h1,
.hb-section-dark h2,
.hb-section-dark h3 {
  color: var(--hb-paper);
}

.hb-section-dark::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--hb-red) 0%, var(--hb-red) 55%, var(--hb-gold) 55%, var(--hb-gold) 62%, var(--hb-blue) 62%, var(--hb-blue) 100%);
}

/* 数字统计卡片（用于页面数据展示） */
.hb-stat-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: var(--hb-space-4);
  background: var(--hb-paper);
  border: 1px solid var(--hb-gray-300);
  border-radius: var(--hb-radius);
  position: relative;
}

.hb-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--hb-red);
  border-radius: 0 2px 2px 0;
}

.hb-stat-card__number {
  font-family: var(--hb-font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--hb-ink);
  line-height: 1.1;
}

.hb-stat-card__label {
  font-size: 0.8rem;
  color: var(--hb-gray-600);
}

.hb-stat-card__number--blue {
  color: var(--hb-blue);
}

.hb-stat-card__number--gold {
  color: var(--hb-gold);
}